Apparatus and method for producing aminoanisole by reduction of sodium hydrosulfide

Abstract

The invention discloses a device and a method of aminoanisole production by sodium hydrosulfide reduction. The device comprises a nitroanisole storage tank, a sodium hydrosulfide storage tank, an alkaline liquor storage tank, a primary reduction kettle, a secondary reduction kettle, a tertiary reduction kettle, a discharge liquid level control tank, a reduction solution cooler, a reduction solution separator, an aminoanisole storage tank and a wastewater storage tank, wherein the primary reduction kettle, the secondary reduction kettle and the tertiary reduction kettle are the same in structure. The continuous production is achieved; the automation degree is high; the production efficiency can be improved; the labor intensity of workers is reduced; the production cost is lowered; the safety performance of the device is improved; and the intrinsic safety is achieved.

Description

technical field [0001] The invention belongs to the field of chemical production, and in particular relates to a device and method for reducing sodium hydrosulfide to produce aminoanisole. Background technique [0002] Aminoanisole (mainly o-aminoanisole or p-aminoanisole) is an important dye, spice and pharmaceutical intermediate. At present, the domestic production of aminoanisole mainly adopts three production processes of alkali sulfide reduction, sodium hydrosulfide reduction and catalytic hydrogenation reduction. Using sodium sulfide reduction, the amount of waste water and waste solids is large, and the production cost is high. The use of catalytic hydrogenation reduction process requires hydrogen resources, high requirements for equipment manufacturing, and large project investment. However, the use of sodium hydrogen sulfide reduction process has small waste water and waste solids. , and the domestic by-product sodium hydrosulfide is rich in resources and low in pr...

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Problems solved by technology

[0003] There are manufacturers in China that use the sodium hydrogen sulfide reduction process to produce aminoanisole, but they use intermittent reduction devices for production, which have low production capacity, high labor intensity and high production costs.

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